Yeah a separate thread or a PM first may have been warranted. It may give the illusion that if you doubt it more people can doubt it and scare away all buyers. Now if you are
positive that the dial is refinished and you are sure the majority of people would back you up on it that's one thing and maybe warrants a post directly on the listing. But in this case (and as I suspect you'll hear more from other members - it is original) starting another thread (maybe even first a PM) where it could be more of a discussion is more warranted.